C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/14, 49/77
C03B 37/05 (2006.01) B22F 9/00 (2006.01) B22F 9/10 (2006.01) C03B 17/02 (2006.01) C03B 17/06 (2006.01) C03B 37/022 (2006.01) C22C 45/00 (2006.01)
Patent
CA 1203984
ABSTRACT The method for forming a metallic, dielectric or semiconductor modified amorphous glass material in- cludes the steps of forming a fluid host matrix material on a substrate surface having relative movement thereto, such as a wheel; directing a fluid modifier material in a stream, as from a nozzle toward the substrate surface in a direction such that it converges with the host matrix material; maintaining the temperature of the sub- strate or wheel between 4.2°K and ambient room temperature while rotating the wheel at a velocity of 1000 to 5000 rpm to obtain a surface velocity of between 1000 to 4000 cen- timeters per second thereby to obtain rapid quenching of the host and modifier materials as they contact one another at a rate of from 104 to at least 108°C per second or more to produce a ribbon of modified amorphous glass material in which the electrical and optical transport properties and the number and type of electronic con- figurations can be controlled. The modified material can range from an alloy to various degrees of alloying and modification to one in which only modification and doping actions exist. This provides a new method of synthesizing materials in which modifier atoms can be incorporated at various intervals or layers or a bulk material whose sur- faces can be distinctly chemically different from the bulk interior can be made by this process. For example, rel- atively soft substrate bodies with an exceedingly hard surface or different chemical, electrical or optical pro- perties can be made throughout the material. By uti- lizing gases as well as liquids even a complete bulk material can be made and yet have a controlled oxidized surface or layer. Further, not only liquids and gases can be utilized, but solids which can chemically interact with the velocity deposited materials can be utilized to add another type of modification. The apparatus can in- clude metal spinning apparati such as reservoirs, nozzles and the wheel for carring out the method.
385376
Flasck Richard A.
Ovshinsky Stanford R.
Energy Conversion Devices Inc.
Macrae & Co.
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